<em>r = 15 cm</em>
<em>formula</em>
<em>V = πr²×h/3</em>
<em>replace</em>
<em>4950 = 22/7×r²×21/3</em>
<em>4950 = 22/7×r²×7</em>
<em>4950 = 22×r²</em>
<em>r² = 4950/22</em>
<em>r² = 225</em>
<em>r = √225</em>
<em>r = √15²</em>
<em>r = 15 cm</em>
1. The keyboard is an example of an input device.
2. A mouse is an example of an input device.
3. Display Monitors are examples of output devices as they display information.4. Audio speakers are examples of output devices.5. Headsets with microphones are an example of both an input and output device as they allow sound to be inputted and receive sound.6. Printer/Printer scanner. A printer would be an example of an output device, however, a printer scanner combination would be both input and output.
Answer: Unified communication
Explanation: Unified communication is the communication technique in which merges various communication routines into a individual business.It works as the phone system which helps in increment of productivity in an organizational business.
The unifying of voice,data/information,video etc is done for optimizing and improving the business that also results in faster communication rates, secure communication etc.
Answer:
The internet is considered as Wide Area Network (WAN).
